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SubjectRe: [PATCH 2/5] media: i2c: imx290: Add support for test pattern generation
Hi Sakari,

On Tue, Dec 03, 2019 at 10:48:50AM +0200, Sakari Ailus wrote:
> Hi Manivannan,
>
> On Sat, Nov 30, 2019 at 12:35:38AM +0530, Manivannan Sadhasivam wrote:
> > Add support for generating following test patterns by IMX290:
> >
> > * Sequence Pattern 1
> > * Horizontal Color-bar Chart
> > * Vertical Color-bar Chart
> > * Sequence Pattern 2
> > * Gradation Pattern 1
> > * Gradation Pattern 2
> > * 000/555h Toggle Pattern
> >
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> > drivers/media/i2c/imx290.c | 41 +++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 40 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> > index 1d49910937fb..e218c959a729 100644
> > --- a/drivers/media/i2c/imx290.c
> > +++ b/drivers/media/i2c/imx290.c
> > @@ -26,12 +26,19 @@
> > #define IMX290_REGHOLD 0x3001
> > #define IMX290_XMSTA 0x3002
> > #define IMX290_FR_FDG_SEL 0x3009
> > +#define IMX290_BLKLEVEL_LOW 0x300a
> > +#define IMX290_BLKLEVEL_HIGH 0x300b
> > #define IMX290_GAIN 0x3014
> > #define IMX290_HMAX_LOW 0x301c
> > #define IMX290_HMAX_HIGH 0x301d
> > +#define IMX290_PGCTRL 0x308c
> > #define IMX290_PHY_LANE_NUM 0x3407
> > #define IMX290_CSI_LANE_MODE 0x3443
> >
> > +#define IMX290_PGCTRL_REGEN BIT(0)
> > +#define IMX290_PGCTRL_THRU BIT(1)
> > +#define IMX290_PGCTRL_MODE(n) ((n) << 4)
> > +
> > /* HMAX fields */
> > #define IMX290_HMAX_2_1920 0x1130
> > #define IMX290_HMAX_4_1920 0x0898
> > @@ -99,6 +106,17 @@ static const struct regmap_config imx290_regmap_config = {
> > .cache_type = REGCACHE_RBTREE,
> > };
> >
> > +static const char * const imx290_test_pattern_menu[] = {
> > + "Disabled",
> > + "Sequence Pattern 1",
> > + "Horizontal Color-bar Chart",
> > + "Vertical Color-bar Chart",
> > + "Sequence Pattern 2",
> > + "Gradation Pattern 1",
> > + "Gradation Pattern 2",
> > + "000/555h Toggle Pattern",
> > +};
> > +
> > static const struct imx290_regval imx290_global_init_settings[] = {
> > { 0x3007, 0x00 },
> > { 0x3018, 0x65 },
> > @@ -394,6 +412,22 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
> > case V4L2_CID_GAIN:
> > ret = imx290_set_gain(imx290, ctrl->val);
> > break;
> > + case V4L2_CID_TEST_PATTERN:
> > + if (ctrl->val) {
> > + imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW, 0x00);
> > + imx290_write_reg(imx290, IMX290_BLKLEVEL_HIGH, 0x00);
> > + mdelay(10);
>
> Any particular reason for a busy loop instead of sleeping? Same below.
>

Nothing. I should've used msleep() here... Will change it.

Thanks,
Mani

> > + imx290_write_reg(imx290, IMX290_PGCTRL,
> > + (u8)(IMX290_PGCTRL_REGEN |
> > + IMX290_PGCTRL_THRU |
> > + IMX290_PGCTRL_MODE(ctrl->val)));
> > + } else {
> > + imx290_write_reg(imx290, IMX290_PGCTRL, 0x00);
> > + mdelay(10);
> > + imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW, 0x3c);
> > + imx290_write_reg(imx290, IMX290_BLKLEVEL_HIGH, 0x00);
> > + }
> > + break;
> > default:
> > ret = -EINVAL;
> > break;
> > @@ -878,7 +912,7 @@ static int imx290_probe(struct i2c_client *client)
> >
> > mutex_init(&imx290->lock);
> >
> > - v4l2_ctrl_handler_init(&imx290->ctrls, 3);
> > + v4l2_ctrl_handler_init(&imx290->ctrls, 4);
> >
> > v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
> > V4L2_CID_GAIN, 0, 72, 1, 0);
> > @@ -896,6 +930,11 @@ static int imx290_probe(struct i2c_client *client)
> > INT_MAX, 1,
> > imx290_modes[0].pixel_rate);
> >
> > + v4l2_ctrl_new_std_menu_items(&imx290->ctrls, &imx290_ctrl_ops,
> > + V4L2_CID_TEST_PATTERN,
> > + ARRAY_SIZE(imx290_test_pattern_menu) - 1,
> > + 0, 0, imx290_test_pattern_menu);
> > +
> > imx290->sd.ctrl_handler = &imx290->ctrls;
> >
> > if (imx290->ctrls.error) {
>
> --
> Sakari Ailus

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